I have enjoyed several evenings (and one early morning) viewing and photographing Comet C/2025 A6 (Lemmon). My first sighting was the morning of 06 October 2025. By mid-October the comet had moved enough that it was visible in the evening sky.

From the Wikipedia entry for the comet:

C/2025 A6 (Lemmon) approached Earth at a distance of 0.60 AU (90 million km; 56 million mi) on 21 October 2025. It reached an apparent magnitude of 3.5 to 4.4 according to different estimates, indicating that it could be visible to the naked eye from sufficiently dark skies. During its closest approach the comet was visible in the sunset sky with a solar elongation of 42 degrees.

Here are some images and time-lapse videos of the comet.

A time-lapse video of the comet on the same morning shows how quickly the comet moves against the background of stars in a period of one hour.

Viewing the comet in the evening was much easier.

Time-lapse video of the motion of the comet (18 October 2025).

The following night I switched lenses to a medium telephoto (180mm) and was able to resolve a lot of detail in the tail of the comet.

The next evening I went to Ashurst Lake (southeast of Flagstaff) to try and capture the comet with reflections in the water. This time I shot with a wide angle lens (35mm) to get the evening sky with the lake.

A few nights later I was in Sedona and shot this image from the Cultural Park on the west side of town. There was a lot of green airglow present low in the sky. Also, the dome of light in the center of the image is from Las Vegas — 200 miles away.

It was time for the big lens — the Nikon 200–500mm lens at full telephoto. These were taken at Upper Lake Mary. The focus is just a bit soft owing to operator error but it still shows a lot of interesting detail in the tail.

The moon is nearly full right now. I’ll wait about a week until the skies are very dark again and shoot more images of the comet before it fades away.